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Cheap flights from Chicago (CHI) to Seattle (BFI)

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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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Cheap flights from Chicago to Seattle in November , December 2025

30 Nov - 11 Dec $ 1,064.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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25 Nov - 11 Dec $ 1,091.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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29 Nov - 11 Dec $ 1,154.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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Last minute flights from Chicago to Seattle

25 Nov - 01 Dec $ 1,441.00
CHI
Chicago
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
CHI
Chicago
Pick dates
29 Nov - 01 Dec $ 1,442.00
CHI
Chicago
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
CHI
Chicago
Pick dates
29 Nov - 01 Dec $ 1,497.00
CHI
Chicago
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
CHI
Chicago
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One-way flights to Seattle from Chicago

7:57 PM - 4:05 PM
Air Excursions
2 Stops
22h 58m
CHI - BFI
$ 644
Kiwi
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11:42 AM - 5:35 AM
Air Excursions
2 Stops
20h 43m
CHI - BFI
$ 664
Kiwi
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11:42 AM - 8:15 AM
Air Excursions
2 Stops
23h 23m
CHI - BFI
$ 664
Kiwi
Pick dates

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

Related info for your journey
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.